15mm inner diameter stainless steel ring for Optimist mainsail sheet : The stainless steel ring is fixed to the boom's sheeting shackle. This ring allows the tackle's snap hook to be attached to it. Manufactured by Optiparts, with a higher breaking strength than standard stainless steel rings.
- Thickness: 3mm
- Inner diameter: 15mm
- Outer diameter: 21mm
- Breaking load: 650kg